One of the customers vomits change (while an imagined wallet) and Stan tells Dipper to clean it up. While giving a tour of the shack, Stan shows the tourists several of his attractions, including "The Preteen Wolf Boy" who is really just Dipper in a wolf costume. She jokes about Mystery Shack bumper stickers with the customers.
Dipper is excited and grabs a mace and goes out hunting, falling out the window because of the mace on his way. Then we see some of the examples of Mabel's changes.
Afterwards, Dipper appears with a moving sack containing monster he caught.
They talk about what they don't like about the way the Shack is run.
Mabel goes to complain about Stan rejecting one of Soos' ideas, and they end up making a bet.
One woman calls Mabel "bad" and asks how much one is. Unfortunately, Stan spots her and is mad at her for giving it away for free. She puts stickers that say "Please" and "Thank you" on Stan.
Stan takes them off while saying "The word please doesn't make me any money kid." Dipper and Mabel then criticize Stan's work methods. Later, Soos, Wendy, Mabel, and Dipper paint the Mystery Shack sign with sparkles. If Stan earns more money on his three-day vacation than Mabel while she runs the Mystery Shack, Mabel has to wear a shirt around that says "Loser" for the rest of the summer. If Mabel earns more, Stan has to sing a song about apologizing and to let Mabel run the shack for the rest of the summer. Unfortunately, the results are not as expected and Mabel finds herself just trying to get back some normalcy. Meanwhile, Grunkle Stan sets off to win big money on a television game show. While attempting to fight it, Mabel pours water on it, which only makes it stronger, and the creature starts destroying parts of the Mystery Shack.